Method for forming stress dispersing type prestress anti-pulling anti-floating pile and reinforcement steel strand cage of pile

The invention provides a method for forming a stress dispersing type prestress anti-pulling anti-floating pile and a reinforcement steel strand cage of the pile. At least one depth position of the reinforcement cage is provided with double reinforcing bars, a plurality of steel strands which are provided with cases and extend downwards from the top end of the reinforcement cage bypass the double reinforcing bars and are connected with clamping locks, and a steel strand U ring structure is formed. Or, the whole steel strand which is provided with a case and extends downwards from the top end of the reinforcement cage bypasses the double reinforcing bars and turns around by 180 degrees to extend upwards to the top end of the reinforcement cage, and the steel strand U ring structure is formed. After concrete is poured, the cases of the steel strands can be stuck to the concrete, and the sliding of the core wires of the steel strands relative the cases cannot be influenced. Therefore, the steel strand U ring stru